Dynamo-electric machine.



No. 876,568. PATENTED JAN. 14, 1908. 0. E. LORD DYN AMO ELECTRIC momma.

P 01mm FIIID Urn 7,10o U M L J a 3SHF BIS*SHEET 2 r h m v Witnesses No. 876,568. PATENTED JAN. 14

G. B. LORD.

DYNAMO ELECTRIC MACHINE.

- APPLICATION FILED JUNE 1, 1005.

3 SHEETS-SHEET 3.

Fl 'y. 5.

In men [or VVil'n esses 'ofthe machine through openings UNITED STATES CHARLES E. Loan, or-nonwoon, OHIO, ASSIGNOR ro inn sir" v stat/rare MANUFACTURING OOMPAhY, A CORPORAIION O DYNAMO-E LE CTRTC MLAGHIHHS} Specification of Letters Patent.

No. s7e,eee.

Application filed. June '7. 1305. Serial No. ZE LIJS,

To all whom it may concern: Be it known that I, CHARLES F. Loan, citizen ofthe United States, residing at Nor wood, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Dynamo Electric Machines, of which the following is a full, clear, and exact specification.

My present invention relates to im novements in the construction of dynamo-electric machines, particularly high-speed turbo-gem erators, and means for ventilating same.

In the types of dynamo-electr1c machines most commonly emplo ed at the present time the rotatable mem er is provided With connecting axial and radial passageways, and the stationary member is provided with radial passageways through its core and between its windings. The passageways are so arranged that when the machine is in operation, the ventilating currents of air enter the rotatable member through said axial passage-ways, thence flow through the radial passage-ways of said member into the airgap 0 the machine, thence through the passage-ways of the stationary member and out in the pe riphery-of its frame or yoke. In high speed machines and particularly in turbo-generators, in which the rotatable member has a comparatively small diameter, it is practi-- call impossiblewith the construction just descri ed to force enough air across the air-gap to .ventilate the machine, or to ventilate properly the core and windings of the stationary member. Furthermore with such a construction when the machine is run at high speeds the air flowing at an extremely high velocity-through the passageways of the machine,"3'and the streams of air flowing from the radial passage-ways of the rotatable member and impinging upon the windings and other ggojectmg iportionsof the stationary mentr produce a ver disagreeable and. ex tremely objectionab e noise.

The object of my invention is to construct a dynamorelectric machine and the ventilating pas agc-ways'there-through, so that sufficientv ir to ventilate all parts properly may be rdadily supplied to the machine and the noise due to the flow of air maybe re-- duced to a minimum.

In carrying out my invention, I provide the stationary member of the machine with passage-ways through Whicha cooling me out in the an infill i.)

the currents of air dium is adapted tube for an, and. means for conlim'n has cooling medium to said sagaw while on its way t" rough the st; tionary member so as to the oooif medium from *s'" V id passe e ways in the stationary member into the gap between the and rotatemember, or vice ve sa. The rotatable her is preferably provided i 4 means forcing the cooling; :Qdlfllll t the p sage-ways in the s a'tionary member, but these means may he externa to the macni if so desired, 7 i

In another my invention consists a dynaino-clectric machine having a rotatable and a stationary member, the latter he ing provided with ventilating passage-ways arranged substantially concentrically about the axis of the rotatable uremia-rand also having means for cutting oii' direct commw nication between. said. passageways and the air-gap of the machine. I

The invention further consists oi improve' ments in. detai of construction and in novel combinations which ll be her after described Meier n which it my inven l scale or: a a iongitn: conrirr Fig. is a sect on on a 1. line 2 oi Fig. IE:

section of machine is a section on line 5---5 tional v arrang nnr sageways t .rr

W 4 {)1 g and the 10112.11] 1i. lbs u is etc! rotate, ii" comprises the with. p

to the passageways groups of laminations vented from entering the air-gap frame 12 is also provided with the passageways 18 communicating with 0 enings 19 at the periphery of the frame an forming the exit for the air currents after they have passed through the passageways of the stavtionary mem er. Said stationary member also supports in any desired manner the win s 20. To assist in confining the cur- Tents 0 air to the passage-ways in the frame of the machine, I provi strips or plugs 23 which block the passage-- was in said core between the windings 20 an out oif a direct communication between the air-gap and the passage-ways 15. The latter passa e-ways are, as will be observed, arranged substantially concentricall about the axis of the rotatable member an the air enters said passage-ways at the periphery of the machine, and'flows out again at the periphery without passing across or through the air-gap 22.

The de'sired current or blast of air through the passage-ways of the stationary member is preferably produced by the radially ares 24, mounted upon the ends of the rotatable member 10. However, this ran ed fan bla source of air supply may be entirely independent of the machine, if desired. To produce a ventilating current or blast of air through the air-gap 22 I provide the angularly arranged fan-blades 25 also mounted u on the ends of the rotatable member. T ese blades are constructed to produce a current of air over the periphery of said rotatable member in a direction substantially parallel tothe axis of said member. The ro tatable member may, ifdesired, be provided with the ordinary connecting axial and radial ventilating openings for ventilating the interior thereof.

In the operation of the machine as constructed according to Figs. 1, 2, and 5, the

air-currents. for the air-gap flow as indicated a by the arrows, being forced by the angularly arranged fan-blades 25. The air forventilating the stationary member {lows from radial fan blades 24 into the passageways 1. toward the periphery of the machine in the directions indicated b r the arrows in Fig. 2. As shown in Fig. 2, t 10 passageways 13 are four in number, communicating with the passageways 1 1 but separated from each other by the partitions 26. Any (lesired number of these passageways may be employed. The air enters said assageways 14 from passage- Ways 13 at each endof the machine and from thence flows into the passageways 15,(as indicated by arrows in Fig. 5) substantially concentrically about .the axis of the machine, to-

e the end heads 21.; vTheblast of air in its passage through the said frame at 30.

ward the exit passage-ways 18 and openings 19 in the periphery of the machine frame. passage-ways 14 leading from opposite end. of the machine are preferably separated from each other by the partitions 28. The air is constrained to follow the paths through passageways 15, as indicated in Fig.5, by means of the separating strips or plugs 23 and the partitions 29.

In the modification 'illustrated'in Fig. 3, the angularly arranged fan-blades for producing the blast of air through the a'r-galp are mounted upon one end of the rotatab e member-10 st 25, and the radially arranged,

blades 24" for producing the current of air for ventilating the stationary member are mounted u on the opposite end of said rotatable mem er. In this case the blast of air flows from the radially arranged blades into the receiving passage-way 13 from which it passes into the single passage-way 14, thence into the passageways 15, sweeping completely aroun the machine, as shown by the arrows in Fig. 4', and leaving same through the passage-ways 18 and out through the openings 19" in the periphery of the frame. In this arrangement, but a single guiding partition 29 is employed, making a simple arrangement of passage-ways through the stationary member.

Various means may be employed for cutting off the direct communication between the passage-ways 15 and the air-gap 22. One construction which may answer'for this pur -ose is shown in Fig. 6, in which the frame of t e machine is indicated at 12. The laminations of the core 17 are dove-tailed into I Said laminations are slotted at 31 to receive the windings 20 which are held in place in the slots-by the wedges 32. These wedges also serve to hold the short plug-pieces 23* which prevent the flow of air from passage-ways 15 through the windings into the air-gap 22, or vice versa. The wedges and plugpieces are preferably so constructed that they present a substantially smooth cylindrical surface 35, when assembled in the machine. To maintain the groups of laminations properly spaced apart to form the passage-ways 15, ventilating segments carrying the separating blocks 33 and 33 are provided.

In the appended caims I aim to cover all modifications which do not depart from the spirit of the invention and I do not desire to limit myself to the specific arrangements illustrated and described herein.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a dynamo-electric machine, a stationary member having a core formed of groups of laminae spaced apart to provide ventilating assage-ways through which -a cooling medium is adapted to be forced,

The

iiieans for'forcing a cooling medium through said passage ways, a rotatable member, and means or preventing said cooling medium from passing from the passage-ways in said stationary member into the air-gap between the stationary 'member and the rotatable member.

2. In a dynamo electric machine, a stationary core made up of groups oflaniinrspneedapart to form ventilating passageways tween, a rotatable 'nember, means for -g 'a blast ot air throughsaid passage and means for preventing said blast of il'said stationary ways, an hile passing througl core froin'entering the alr-gap between the rotatable member and stationary core.

3,111 a dynamo electric machine, a statibnary member provided with ventilating assage-ways, a rotatable member, means 3 causinga current of air to flow through the air-gap between said members and a curi'ent'of air to flow through said'ventilating I "iass ageqvays, and means for preventing the ,atter current of air, while passing through stationary member, from entering said air-g'a I I fit a dynamo-electric machine, a rotate ble field-magnet, and a stationar 1 armature having a core formed oi groups of lamina: spaced. apart to provide ventilating passage- A permit a flow of air from the periphery of the machine through said passagewa s and out again at the periphery of themachine, in combination withineans for confining the air to said passage-ways in its passage through said stationary armature core so as to prevent same from entering the air gap between the rotatable field-magnet and the armature.

. 5. 'ln'a dynamo-electric machine, a rotatahie fieldmagnet, and a stationary armature having ventilating passage-Ways which permit, aflow of air from the periphery of the machine through said passageways and out again at the 'hination Wit 1 means for confining the air to said passage-ways while flowing through said stationary armature so as to prevent same from entering the air-gap between the rotameans for causin a flowof air-over the per heryof tl1eheld-1nag11et substantially para. el to the axis thereof.

I 6. In advnamo-electric machine, a rotate.

table field-magnet and the armature, andso as to prevent same eriph'ery of the machine, in. comwith ventilating pass 'magnet and the armature, r

a current of air through passage-Way and for tor-("Ting allow of air over the pcrinh" ery oi the field magnet substantially parallel to the axis thereof,

7. l n a dynamowlectrip machine, a rotatable member, a stat-iota: 3;" member having a core formed of grou a ol' lamina. spaced apart to pro vidc ventilating passage-Ways arranged substantially concerntrically about the axisol' said rotatable member, and means for cutting oil direct communication between the sai l. passage-Way's and the air-gap of the machine. I

' 8. In a lynamo-clectric machine, a rotatable member, a stationany member provided. with ventilating passage-ways stantially concentricallyabout the axisfljf said rotatable member, means or cutting oil" direct conunuuicntion between the said passageways and the aingap of. the machine, and means for producing an axiai ventilation through said air ga 9. In a ily'11amoelcctric machine, a rotate hie member, a stationary member provided with ventilating passage-Ways arranged substantially concentrically abent the aicia of said rotatahh-i n'ieinber, means For cutting oil direct communication between the said pas sageavays and the air-gap of the n'iachine, and lan blades carried by the rota table member for producing an axial current of air through said air-gap.

l(). in a d ynaino-rlectric machine, a rota table member, a stationary member provided Ways 'arrang sni stantialiy concentrically about the axis of said rotatable member, means for cutting off direct comn'innicntimi hot en the said passage weys and the aingap o .ahc machine, fan

blades carried by the rotatai'ile member .102

producing an axial (Inn-eat of a r through said air-gap, and means also sari. 'i by the rotatable member for forcing a current of air tl'n'ough said passageways.

l-l in a dynamo-elect. ic machine, rotate ble field-i'nagnet, astationary armature haw ing Ventilating passageways which permit a flow of air from the periphery of the machine through said passage-ways and out again at the periphel'v of the machine, in combination with means to! coniir m the air to' eaid passageways whileiiowing through said etation ary arm'at'ure so to preve' teame firementering the air-gap hetween'the rota ahie fieidlly arranged Fan-blades mounted upon the en field-magnet forforcing cnrrentof air te'the periphery of the machine, and means for conducting said currentof air to the passageways in said stationary nature.

12. 'In a dynamo-elec lie machine, a rotatable fieldanagnet, a stationary a mati'ne having ventilating pas *"e-Ways which permit a how of air from the periphei of the machine through said i arranged sub-- passage-Ways and out i angularly arranged fan blades also carried by said field-magnet for producing a current of air axially over the periphery of the field- 4 magnet.

13. In a dynamo-electric machine, a rotatable field-magnet, a stationary armature having ventilating passage-ways which permit a flow of air from the periphery of the machine through said passage-ways and out again at the periphery of the machine, in combination with means for confining the air to said passage-ways while flowing through said stationary armature so as to prevent same from entering the airap between the rotatable field magnet and t 1e armature, radially arranged fan-blades mounted upon the end of the field-magnet for the. urpose of forcing a current of air to the perip ery of the machine, means for conducting said current of air to the passage-ways in said stationary armature, and means also carried by the field-magnet for producing a current of air through the air-gap of the machine;

14. In a dynamo-electric machine, a rotatable member, a stationary member provided with ventilating passa eways arranged substantially eoncentrieaily about the axis of said rotatable member, windings-in said 'stationary member, means for preventing a flow of air from said passage-ways through said windin s into the airap, or vice versa.

15. I n a dynamo-e eetric machine, a rotatable member, a stationary member provided with ventilating passa e-ways arranged sub stantially' concentricaIly about the axis of said rotatable 'membcr,.windings in'said stationary member, and plugs between adjacent windings to prevent a flow of air from said passage-ways through said windings into the air-gap, or vice versa! 1'6. In a dynamo-electric machine, a rotatable member, a stationary member provided with ventilating passa e-ways arranged substantially concentrically about the axis of said rotatable member, windings in said stationary member, plugs between adjacent windings .to prevent a flow of air from said passage-ways through said windings into the air-gap or vice versa, and means for holding said windings in position in said stationary member, said means also serving to hold said plugs in position.

17. In a dynamo-electric machine, a rotatable member, and a stationary member, said vent ilating;

stationary member having riphery. i

sage-ways .0 u only at its'outer,

18. In a ynamo-electric mac i e, .a' rota-. table member, a stationary member, sta

tionary member having a plurality of air sage-ways concentric with the of the chine, said air assage-wa the outer perip ery tew'ar ne'r peripherof the stationary member.

19. Ina ynamo-electric machine, arotaF table member, a stationary member, said ate-"1f having aplurality of air p'as-' tionary member for conducting air to. and

sage-wa 3, means s extending from but not to the in from said passage-ways, said passage-ways communicating with the air conducting means wholly at the outer periphery of s passageways.

20. In a dynamo-electric machine, a rotatable member, a stationary member surrounding said rotatable member, said stationary member having a core made up of. groups of-larninae spaced apart to form air passageways concentric wit the axis of the machine, and means for forcing air through the air, passageways without bringing same into contact with t e rotatable member.

21. In a dynamo-electric machine, a sta-;

tionary core having a ventilating passageway open only at the outer periphery of said core. tiona core made up of groupspf lamina space apart and providing ventilating passageway through which a cooling medium may pass, means for forcing a cooling medium through said passageway, and means for preventing the coo medium from passin into the air gap of t e machine;

'23. he combination with a motorcese having an air distributing chamber and an air exit passage; mounted therein, and partitions between the stator parts to form continuous air.passages from the distributing chamber to the air exit.

22. In a dynamo-electric machine a as v of a stator and a rotor 24. In a dynamoelectric machine, a rotor,

which permit a fiow of air from the perip ery\ of the machine through said passagxeways and out a ain at the eriphery of t e machine, in com ination wit means for confinin the air tosaid passage-way while flowing t irough said stator so as to prevent same from'entering the air-gap between the rotor' and stator, radially arranged fan-blades mounted upon the end of the rotor for forcing a current of air to the riphery of the machine,.and means for condiicting said current of air to the passage-ways in said stator.

25. In a dynamo-electric machine, a rotor, a stator havim ventilating passage-ways which permit a ow of air from the periphery of the machine through said passa e-ways and out again at the periphery of. t e machine, in combination with means for confin- 'a stator having ventilating passage-we. s I

' ing means for sr'npplying a blast of air to said member.

ing the air to said passage-ways while flowthe axis of said rotatable member, means for ing through said stator so as to prevent same from entering the air-gap between the rotor and the stator, radially arranged-farrblades mounted upon the end of the rotor for the pn ose of" forcing a current of air to the periphery of the machine, means for corn. ducting said current of air to the passageways in said stator, and means also carried by the rotor for producing .a current of air through the air-gap of the machine.

26.' In a dynamo-electric machine, a sta- ,tion'ar member-having passage-ways formed theret rough, a rotatable member, and means for ventilating said members comprisstationary member, and for su'iplying an independent blast of air to sal rotatable 27. In a dynamo-electric machine, a sta tionary member built up of grouped laminations and' provided wlth passageways between said grouped laminations, a rotatable member, means for forcing a blast of air through the passage-ways of said stationary member, means for preventing l blast of air from entering the air-gap betvxizen the roi tatable and stationary members, and means for supplying an independent blast of air to the periphery of said rotatable member through said air-gap.

28. In a dynamo-electrio machine, a stationary member provided with ventilating assage-ways, a rotatable member, means or causing a current of air to [low through the air-gap between said members, means for causm a current of air to [low through said ventilating passage-ways, and means for preventing an inter-mingling of said air currents in the air ga 29. In a dynamo-electric machine, a rotatable member, a stationary member provided with ventilating pass gearays arranged substantially concentrically about cutting Oilf direct eommunication between the said. passage-ways and the air-gap of the machine, fainblades carried by the rotatable member For producing an axial current of through said air-gap, and means for forcing a current of air through said passag rays, the currents cl. air in said air gap and said passage-ways being entirely independent of each other.

30. In a dynamo-electricmachine, rotatable field magnet, a stationary armature having ventilating passage-ways which pen mit a flow of air in a the periphery of the machine through said passageways and out again at the periphery of tliemaeliine, incom bination with means for confining the air to said passage-ways while flowing-through said stationary armature so as to prevent'same from entering the air gr between the rotatable field magnet and t 1e armature, means for causing a flowof air through. said. sage-ways, and means for causing an ind.e pendent flow of air through the air-gap substantially parallel to the axis of the rotatable field magnet.

31. in a dynamo-electric machine, a statiomi-ry member built up of laminae and pro- .vided with a passageway, a rotatable mem-- ber, means for forcing a blast of air through the passageway of said stationary member, means [or preventing said biast of air in its passage through the machine from entering the air gap between the rotatable and stationary members, and means for supplying an independent blast of air to said rotatable member.

ln testimony whereof I ailix my signature in the presence of two witnesses.

CHARLES E. Loan] \Vitnesses L. liownnnnno, FRED J. lunsar. 

